Finding the Fourth Proportional to 8,085.40, 12,155.10 and 7,016.20

Step by Step Solution

1. Step 1: Write the proportion equation
   8,085.40 : 12,155.10 = 7,016.20 : x
2. Step 2: Convert to fraction form
   8,085.40/12,155.10 = 7,016.20/x
3. Step 3: Cross multiply
   8,085.40x = 12,155.10 × 7,016.20
4. Step 4: Simplify right side
   8,085.40x = 85,282,612.62
5. Step 5: Solve for x
   x = 85,282,612.62/8,085.40
6. Step 6: Final answer
   x = 10,547.73